public static void main(String[] args) {

        System.out.println(Math.sin(Math.toRadians(30)));

        System.out.println(Math.sin(Math.PI / 6));

        System.out.println(Math.tan(Math.toRadians(45)));

        System.out.println(Math.tan(Math.PI / 4));

        System.out.println(Math.cos(Math.toRadians(60)));

        System.out.println(Math.cos(Math.PI / 3));

    }

}